Online Shill Bidding and an Undisclosed Buyer's Premium
Riverbend Online Auctions lists a restored 1957 tractor with a starting bid of $9,000 and a buyer's premium described only as an 18 percent administrative fee in the final invoice, not in the listing. During the seven-day auction, a bidder using the screen name DeltaDirt places 14 bids that move the price from $9,000 to $16,500. The auctioneer notices that DeltaDirt's bids always arrive within seconds of another bidder's maximum and that the account shares an IP address with the consignor's business. The auctioneer does not cancel the bids or disclose the connection. A legitimate buyer wins at $16,500. After paying the bid plus the 18 percent premium, the buyer sees the bid history and learns DeltaDirt is the consignor's cousin. The buyer demands rescission and a refund of the premium.
1. Analyze the shill bidding by DeltaDirt under auction ethics and consumer protection law.
Read the worked answer
The conduct
- DeltaDirt's bids were shill bids if placed to create a false appearance of demand. The account's link to the consignor and the timing pattern support that inference.
- Shill bidding is fraudulent. It misleads honest bidders about market interest and can inflate the price they pay.
- The auctioneer knew of the connection and did not cancel the bids or disclose it.
Duties
- The auctioneer owes bidders honesty and fair dealing and owes the consignor loyal, lawful service. Loyalty does not require covering a fraud.
- Allowing shill bidding can violate consumer protection law, auction regulations, and the firm's fiduciary duties.
Conclusion
The buyer has a strong claim for rescission or damages. The auctioneer's knowledge turns a seller problem into the firm's problem.
2. Is the buyer's premium enforceable if it appeared only in the final invoice?
Read the worked answer
Disclosure rule
- A buyer's premium is a material term. It changes the total price and must be disclosed before bidding, not first shown on the invoice.
- Hiding an 18 percent fee until after the auction prevents bidders from comparing costs and is unfair and deceptive.
Enforceability
- The premium may be unenforceable if it was not part of the contract the buyer accepted. At minimum, the buyer can seek return of the premium and possibly rescission of the whole sale because the shill bidding affected price.
Practical conclusion
Do not defend the fee on the invoice alone. Fix the listing terms and the bid history problem together.
3. What controls should Riverbend implement for online auctions?
Read the worked answer
Bid integrity
- Prohibit consignors, their relatives, and their agents from bidding unless the sale terms clearly disclose seller bidding and applicable law permits it.
- Screen new accounts for shared IP addresses, devices, payment instruments, and addresses with the consignor.
- Review bid timing patterns and cancel suspicious bids before the auction closes.
Disclosure
- State the buyer's premium, reserve status, and any seller participation in the listing before bidding.
- Use a click-to-accept terms page and retain the record.
Response and records
- Preserve bid logs, account data, and communications.
- Train staff to escalate suspicious bidding.
- Refund or rescind promptly when fraud is substantiated, and consult counsel about reporting.